src/tests/lxc-test-unpriv

   1 #!/bin/bash
   2
   3 # lxc: linux Container library
   4
   5 # Authors:
   6 # Serge Hallyn <serge.hallyn@ubuntu.com>
   7 #
   8 # This is a test script for unprivileged containers
   9
  10 # This library is free software; you can redistribute it and/or
  11 # modify it under the terms of the GNU Lesser General Public
  12 # License as published by the Free Software Foundation; either
  13 # version 2.1 of the License, or (at your option) any later version.
  14
  15 # This library is distributed in the hope that it will be useful,
  16 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18 # Lesser General Public License for more details.
  19
  20 # You should have received a copy of the GNU Lesser General Public
  21 # License along with this library; if not, write to the Free Software
  22 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  23
  24 # This test assumes an Ubuntu host
  25
  26 if [ $(id -u) -ne 0 ]; then
  27         echo "ERROR: Must run as root."
  28         exit 1
  29 fi
  30
  31 # Test if we're using an overlayfs module that handles symlinks correctly. If
  32 # not, we skip these tests since overlay clones will not work correctly.
  33 if modprobe -q overlayfs; then
  34         TMPDIR=$(mktemp -d)
  35
  36         MOUNTDIR="${TMPDIR}/ovl_symlink_test"
  37
  38         mkdir ${MOUNTDIR}
  39
  40         mount -t tmpfs none ${MOUNTDIR}
  41
  42         mkdir ${MOUNTDIR}/{lowerdir,upperdir,workdir,overlayfs}
  43         mount -t overlayfs -o lowerdir="${MOUNTDIR}/lowerdir",upperdir="${MOUNTDIR}/upperdir",workdir="${MOUNTDIR}/workdir" none "${MOUNTDIR}/overlayfs"
  44
  45         CORRECT_LINK_TARGET="${MOUNTDIR}/overlayfs/dummy_file"
  46         exec 9> "${CORRECT_LINK_TARGET}"
  47
  48         DETECTED_LINK_TARGET=$(readlink -q /proc/$$/fd/9)
  49
  50         # cleanup
  51         exec 9>&-
  52
  53         umount "${MOUNTDIR}/overlayfs"
  54         umount ${MOUNTDIR}
  55
  56         rmdir ${MOUNTDIR}
  57
  58         # This overlay module does not correctly handle symlinks, so skip the
  59         # tests.
  60         if [ "${DETECTED_LINK_TARGET}" != "${CORRECT_LINK_TARGET}" ]; then
  61                 exit 0
  62         fi
  63 fi
  64
  65 which newuidmap >/dev/null 2>&1 || { echo "'newuidmap' command is missing" >&2; exit 1; }
  66
  67 DONE=0
  68 KNOWN_RELEASES="precise trusty xenial yakkety zesty"
  69 cleanup() {
  70         cd /
  71
  72         run_cmd lxc-stop -n c2 -k || true
  73         run_cmd lxc-stop -n c1 -k || true
  74         pkill -u $(id -u $TUSER) -9 || true
  75
  76         sed -i '/lxcunpriv/d' /run/lxc/nics /etc/lxc/lxc-usernet
  77         sed -i '/^lxcunpriv:/d' /etc/subuid /etc/subgid
  78
  79         rm -Rf $HDIR /run/user/$(id -u $TUSER)
  80
  81         deluser $TUSER
  82
  83         if [ $DONE -eq 0 ]; then
  84                 echo "FAIL"
  85                 exit 1
  86         fi
  87         echo "PASS"
  88 }
  89
  90 run_cmd() {
  91         sudo -i -u $TUSER \
  92             env http_proxy=${http_proxy:-} https_proxy=${https_proxy:-} \
  93                 XDG_RUNTIME_DIR=/run/user/$(id -u $TUSER) $*
  94 }
  95
  96 # create a test user
  97 TUSER=lxcunpriv
  98 HDIR=/home/$TUSER
  99
 100 ARCH=i386
 101 if type dpkg >/dev/null 2>&1; then
 102         ARCH=$(dpkg --print-architecture)
 103 fi
 104
 105 trap cleanup EXIT SIGHUP SIGINT SIGTERM
 106 set -eu
 107
 108 id $TUSER &> /dev/null && deluser -q --remove-home $TUSER
 109 useradd $TUSER
 110
 111 mkdir -p $HDIR
 112 echo "$TUSER veth lxcbr0 2" >> /etc/lxc/lxc-usernet
 113 sed -i '/^lxcunpriv:/d' /etc/subuid /etc/subgid
 114
 115 usermod -v 910000-919999 -w 910000-919999 $TUSER
 116
 117 mkdir -p $HDIR/.config/lxc/
 118 cat > $HDIR/.config/lxc/default.conf << EOF
 119 lxc.net.0.type = veth
 120 lxc.net.0.link = lxcbr0
 121 lxc.idmap = u 0 910000 9999
 122 lxc.idmap = g 0 910000 9999
 123 EOF
 124 chown -R $TUSER: $HDIR
 125
 126 mkdir -p /run/user/$(id -u $TUSER)
 127 chown -R $TUSER: /run/user/$(id -u $TUSER)
 128
 129 cd $HDIR
 130
 131 if which cgm >/dev/null 2>&1; then
 132         cgm create all $TUSER
 133         cgm chown all $TUSER $(id -u $TUSER) $(id -g $TUSER)
 134         cgm movepid all $TUSER $$
 135 elif [ -e /sys/fs/cgroup/cgmanager/sock ]; then
 136         for d in $(cut -d : -f 2 /proc/self/cgroup); do
 137                 dbus-send --print-reply --address=unix:path=/sys/fs/cgroup/cgmanager/sock \
 138                         --type=method_call /org/linuxcontainers/cgmanager org.linuxcontainers.cgmanager0_0.Create \
 139                         string:$d string:$TUSER >/dev/null
 140
 141                 dbus-send --print-reply --address=unix:path=/sys/fs/cgroup/cgmanager/sock \
 142                         --type=method_call /org/linuxcontainers/cgmanager org.linuxcontainers.cgmanager0_0.Chown \
 143                         string:$d string:$TUSER int32:$(id -u $TUSER) int32:$(id -g $TUSER) >/dev/null
 144
 145                 dbus-send --print-reply --address=unix:path=/sys/fs/cgroup/cgmanager/sock \
 146                         --type=method_call /org/linuxcontainers/cgmanager org.linuxcontainers.cgmanager0_0.MovePid \
 147                         string:$d string:$TUSER int32:$$ >/dev/null
 148         done
 149 else
 150         for d in /sys/fs/cgroup/*; do
 151                 [ "$d" = "/sys/fs/cgroup/unified" ] && continue
 152                 [ -f $d/cgroup.clone_children ] && echo 1 > $d/cgroup.clone_children
 153                 [ ! -d $d/lxctest ] && mkdir $d/lxctest
 154                 chown -R $TUSER: $d/lxctest
 155                 echo $$ > $d/lxctest/tasks
 156         done
 157 fi
 158
 159 # default release is trusty, or the systems release if recognized
 160 release=trusty
 161 if [ -f /etc/lsb-release ]; then
 162     . /etc/lsb-release
 163     rels=$(ubuntu-distro-info --supported 2>/dev/null) ||
 164         rels="$KNOWN_RELEASES"
 165     for r in $rels; do
 166         [ "$DISTRIB_CODENAME" = "$r" ] && release="$r"
 167     done
 168 fi
 169
 170 # Copy the download template cache if available
 171 run_cmd mkdir -p $HDIR/.cache/lxc
 172 [ -d /var/cache/lxc/download ] && \
 173     cp -R /var/cache/lxc/download $HDIR/.cache/lxc && \
 174     chown -R $TUSER: $HDIR/.cache/lxc
 175
 176 run_cmd lxc-create -t download -n c1 -- -d ubuntu -r $release -a $ARCH
 177
 178 # Make sure we can start it - twice
 179
 180 for count in `seq 1 2`; do
 181     run_cmd lxc-start -n c1 -d
 182
 183     p1=$(run_cmd lxc-info -n c1 -p -H)
 184     [ "$p1" != "-1" ] || { echo "Failed to start container c1 (run $count)"; false; }
 185
 186     run_cmd lxc-info -n c1
 187     run_cmd lxc-attach -n c1 -- /bin/true
 188
 189     run_cmd lxc-stop -n c1 -k
 190 done
 191
 192 run_cmd lxc-copy -s -n c1 -N c2
 193 run_cmd lxc-start -n c2 -d
 194 p1=$(run_cmd lxc-info -n c2 -p -H)
 195 [ "$p1" != "-1" ] || { echo "Failed to start container c2"; false; }
 196
 197 run_cmd lxc-stop -n c2 -k
 198
 199 if which cgm >/dev/null 2>&1; then
 200     echo "Testing containers under different cgroups per subsystem"
 201     run_cmd cgm create freezer x1/x2
 202     cgm movepid freezer x1 $$
 203     run_cmd lxc-start -n c1 -d
 204     p1=$(run_cmd lxc-info -n c1 -p -H)
 205     [ "$p1" != "-1" ] || { echo "Failed to start container c1"; false; }
 206     run_cmd lxc-info -n c1
 207     run_cmd lxc-attach -n c1 -- /bin/true
 208     run_cmd lxc-cgroup -n c1 freezer.state
 209
 210     echo "Testing lxc-attach and lxc-cgroup from different cgroup"
 211     cgm movepid freezer x2 $$
 212     run_cmd lxc-attach -n c1 -- /bin/true
 213     run_cmd lxc-cgroup -n c1 freezer.state
 214     run_cmd lxc-cgroup -n c1 memory.limit_in_bytes
 215 fi
 216
 217 DONE=1